<template>
  <div>

    <div style="margin: 10px 0">
      <el-input style="width: 200px" placeholder="请输入名称" suffix-icon="el-icon-search"
                v-model="name" @keyup.enter.native="load"></el-input>
      <el-button class="ml-5" type="primary" @click="load">搜索</el-button>
      <el-button class="ml-5" type="warning" @click="reset">重置</el-button>
    </div>

    <div style="margin: 10px 0">
      <el-button type="primary" @click="handleAdd">新增 <i class="el-icon-circle-plus-outline"></i></el-button>
      <el-popconfirm
          class="ml-5"
          confirm-button-text='确定'
          cancel-button-text='我再想想'
          icon="el-icon-info"
          icon-color="red"
          title="确定要批量删除吗？"
          @confirm="delBatch"
      >
        <el-button type="danger" slot="reference">批量删除 <i class="el-icon-remove-outline"></i></el-button>
      </el-popconfirm>
    </div>

    <el-table
        :data="tableData"
        border
        stripe
        :header-cell-class-name="headerBg"
        @selection-change="handleSelectChange">
      <el-table-column type="selection" width="55"></el-table-column>
      <el-table-column prop="id" label="ID" width="120px"></el-table-column>
      <el-table-column prop="name" label="名称"></el-table-column>
      <el-table-column prop="flag" label="标识"></el-table-column>
      <el-table-column prop="description" label="描述"></el-table-column>
      <el-table-column label="操作" align="center">
        <template slot-scope="scope">
          <el-button type="primary" slot="reference" @click="selectMenu(scope.row)">分配菜单 <i class="el-icon-menu"></i>
          </el-button>
          <el-button type="success" @click="handleEdit(scope.row)">编辑 <i class="el-icon-edit"></i></el-button>
          <el-popconfirm
              class="ml-5"
              confirm-button-text='确定'
              cancel-button-text='我再想想'
              icon="el-icon-info"
              icon-color="red"
              title="确定要删除吗？"
              @confirm="handleDelete(scope.row.id)"
          >
            <el-button type="danger" slot="reference">删除 <i class="el-icon-remove-outline"></i></el-button>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>
    <div style="padding: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[2, 5, 10, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
    </div>

    <!-- 新增弹窗 -->
    <el-dialog title="角色信息" :visible.sync="dialogFormVisible" width="30%">
      <el-form label-width="80px" size="small">
        <el-form-item label="名称">
          <el-input v-model="form.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="标识">
          <el-input v-model="form.flag" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="描述">
          <el-input v-model="form.description" autocomplete="off"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="save">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 菜单分配弹窗 -->
    <el-dialog title="菜单分配" :visible.sync="menuDialogVis" width="30%">
      <el-tree
          :props="props"
          :data="menuData"
          show-checkbox
          node-key="id"
          ref="tree"
          :default-expand-all="true"
          :default-expanded-keys="expends"
          :default-checked-keys="checks">
        <span class="custom-tree-node" slot-scope="{ node, data }">
          <span><i :class="data.icon"/> {{ data.name }}</span>
        </span>
      </el-tree>
      <div slot="footer" class="dialog-footer">
        <el-button @click="menuDialogVis = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleMenu">确 定</el-button>
      </div>
    </el-dialog>
  </div>

</template>

<script>
import Aside from "@/components/Aside";
import Header from "@/components/Header";

export default {
  name: "Role",
  data() {
    return {
      tableData: [],
      form: {},
      total: 0,
      pageNum: 1,
      pageSize: 10,
      name: "",
      collapseBtnClass: 'el-icon-s-fold',
      isCollapse: false,
      sideWidth: 200,
      logoTextShow: true,
      headerBg: 'headerBg',
      dialogFormVisible: false,
      menuDialogVis: false,
      multipleSelection: [],
      menuData: [],
      props: {
        label: 'name'
      },
      checks: [],
      expends: [],
      roleId: 0,
      roleFlag: '',
      ids: []
    }
  },
  created() {
    // 请求分页查询数据
    this.load();
  },
  components: {
    Aside,
    Header
  }
  ,
  methods: {
    saveRoleMenu() {
      this.request.post("/role/roleMenu/" + this.roleId, this.$refs.tree.getCheckedKeys()).then(res => {
        if (res.code === "200") {
          this.$message.success("分配成功");
          // 操作管理员角色后需要重新登录
          if (this.roleFlag === 'ROLE_ADMIN') {
            this.$store.commit("logout");
          }
        } else {
          this.$message.error("分配失败");
        }
        this.menuDialogVis = false;
      })
    },
    async selectMenu(role) {
      this.roleId = role.id;
      this.roleFlag = role.flag;

      // 请求菜单数据
      this.request.get("/menu").then(res => {
        this.menuData = res.data;

        // 把后台返回的菜单数据处理成id数组
        this.expends = this.menuData.map(v => v.id);
      })

      this.request.get("/role/roleMenu/" + this.roleId).then(res => {
        this.checks = res.data;

        //查询该角色拥有的所有菜单，如果某个菜单不存在，则在树形控件中取消选中
        this.request.get("/menu/ids").then(r => {
          const ids = r.data;
          ids.forEach(id => {
            if (!this.checks.includes(id)) {
              this.$nextTick(() => {  //使用$nextTick()处理未来元素，等到这个元素渲染完成之后再去使用它
                this.$refs.tree.setChecked(id, false);
              })
            }
          })
        })
        this.menuDialogVis = true;
      })
    },
    delBatch() {
      let ids = this.multipleSelection.map(v => v.id);  //把一个对象数组变成一个id数组
      this.request.post("/role/del/batch", ids).then(res => {
        if (res.code === "200") {
          this.$message.success("批量删除成功");
        } else {
          this.$message.error("批量删除失败");
        }
        this.load();
      })
    },
    handleSelectChange(val) {
      console.log(val);
      this.multipleSelection = val;

    },
    handleDelete(id) {
      this.request.delete("/role/" + id).then(res => {
        if (res.code === "200") {
          this.$message.success("删除成功");
        } else {
          this.$message.error("删除失败");
        }
        this.load();
      })
    },
    handleEdit(row) {
      this.form = row;
      this.dialogFormVisible = true;
    },
    save() {
      this.request.post("/role", this.form).then(res => {
        if (res.code == "200") {
          this.$message.success("保存成功");
        } else {
          this.$message.error("保存失败");
        }
        this.dialogFormVisible = false;
        this.load();
      })
    },
    handleAdd() {   //点击新增按钮，执行此方法
      this.dialogFormVisible = true;
      this.form = {};
    },
    reset() {  //清空搜索框
      this.name = "";
      this.load();
    },
    load() {
      this.request.get("/role/page", {
        params: {
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          name: this.name,
        }
      }).then(res => {
        this.tableData = res.data.records;
        this.total = res.data.total;
      })

      this.request.get("/menu/ids").then(r => {
        this.ids = r.data
      })
    },
    handleSizeChange(pageSize) {
      console.log(pageSize);
      this.pageSize = pageSize;
      this.load();
    },
    handleCurrentChange(pageNum) {
      console.log(pageNum);
      this.pageNum = pageNum;
      this.load();
    }
  }
}
</script>

<style>
.headerBg {
  background: #eee !important;
}
</style>